On Mon, Jan 16, 2006 at 01:46:14PM -0700, LaMont Jones wrote:
> RFC952: (excerpt)
>
> GRAMMATICAL HOST TABLE SPECIFICATION
> A. Parsing grammar
> <official hostname> ::= <hname>
> B. Lexical grammar
> <hname> ::= <name>*["."<name>]
> <name> ::= <let>[*[<let-or-digit-or-hyphen>]<let-or-digit>]
>
> RFC1123:
> 2.1 Host Names and Numbers
>
> The syntax of a legal Internet host name was specified in RFC-952
> [DNS:4]. One aspect of host name syntax is hereby changed: the
> restriction on the first character is relaxed to allow either a
> letter or a digit. Host software MUST support this more liberal
> syntax.
>
> The patch below changes check_name so that it actually implements the
> RFCs. Admittedly, it doesn't check on maximum label lengths...
I disagree with this patch. I believe the kernel hostname variable (the
one that hostname(1) sets, and that {get,set}hostname(2) query and set)
should not be a FQDN. Instead the FQDN should be looked up using
gethostbyname(3) (which will in turn query /etc/hosts or a nameserver).
Does someone else have a reason why this is not the case?
--
gram
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